:root{
  --bg:#E9ECE8; --surface:#F6F7F4; --ink:#17212B; --muted:#56626D; --rule:#C5CBC4;
  --steel:#33536E; --mark:#F2B705; --focus:rgba(51,83,110,.22);
  --face:#D5DAD3; --face-top:#E6EAE4; --face-side:#C1C8BF;
  --panel:#1D2833; --panel-ink:#EEF1EC; --panel-muted:#A9B4BD; --panel-rule:#34424F;
  --ok:#A6DFA0; --bad:#FFAA9A;
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#12171C; --surface:#1B2229; --ink:#E4E8E2; --muted:#9BA6AF; --rule:#2F3943;
    --steel:#93B6D3; --focus:rgba(147,182,211,.25);
    --face:#2C3641; --face-top:#36424E; --face-side:#232B34;
    --panel:#263240; --panel-rule:#3A4857;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#12171C; --surface:#1B2229; --ink:#E4E8E2; --muted:#9BA6AF; --rule:#2F3943;
  --steel:#93B6D3; --focus:rgba(147,182,211,.25);
  --face:#2C3641; --face-top:#36424E; --face-side:#232B34;
  --panel:#263240; --panel-rule:#3A4857;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,summary:focus-visible{outline:2px solid var(--steel);outline-offset:2px}

.top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 16px;padding:16px 0;border-bottom:1px solid var(--rule)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-stretch:125%;font-size:1.25rem;letter-spacing:-.01em}
.brand svg{width:22px;height:28px}
.seg{display:inline-flex;border:1.5px solid var(--ink);border-radius:7px;overflow:hidden}
.seg button{background:none;border:0;padding:6px 12px;font-size:.875rem;font-weight:600}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}

.intro{padding:44px 0 28px}
.intro h1{margin:0;font-size:clamp(2rem,6.2vw,3.7rem);line-height:1.02;font-weight:800;font-stretch:125%;letter-spacing:-.015em;max-width:17ch}
.intro p{margin:16px 0 0;color:var(--muted);max-width:58ch;font-size:1.05rem}

.nav{display:flex;gap:4px;border-bottom:2px solid var(--ink);overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{background:none;border:0;padding:12px 16px;font-weight:600;color:var(--muted);border-radius:7px 7px 0 0;white-space:nowrap}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{background:var(--ink);color:var(--bg)}

.panel{padding:28px 0 48px}
.panel h2{margin:0;font-size:1.6rem;font-weight:800;font-stretch:112%;letter-spacing:-.01em}
.blurb{margin:4px 0 0;color:var(--muted);max-width:62ch}
.grid{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:32px;margin-top:24px;align-items:start}
@media (max-width:760px){.grid{grid-template-columns:minmax(0,1fr);gap:24px}}

.field{margin-bottom:14px}
.field label{display:block;font-size:.875rem;font-weight:600;margin-bottom:6px}
.ctl{display:flex;align-items:stretch;border:1.5px solid var(--rule);border-radius:7px;background:var(--surface)}
.ctl:focus-within{border-color:var(--steel);box-shadow:0 0 0 3px var(--focus)}
.ctl input,.ctl select{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font:inherit;padding:10px 12px;font-variant-numeric:tabular-nums}
.ctl input:focus,.ctl select:focus{outline:none}
.ctl select option{color:initial}
.u{display:flex;align-items:center;padding:0 12px;color:var(--muted);border-left:1px solid var(--rule);font-size:.9rem;white-space:nowrap}

.out{display:grid;gap:16px;min-width:0}
.fig{margin:0;background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:12px}
.fig svg{display:block;width:100%;height:auto}
.fig text{fill:var(--muted);font-size:11px;font-family:inherit;font-variant-numeric:tabular-nums}
.fig .ink{stroke:var(--ink);fill:none;stroke-width:1.5}
.fig .f1{fill:var(--face);stroke:var(--ink);stroke-width:1.5;stroke-linejoin:round}
.fig .f2{fill:var(--face-top);stroke:var(--ink);stroke-width:1.5;stroke-linejoin:round}
.fig .f3{fill:var(--face-side);stroke:var(--ink);stroke-width:1.5;stroke-linejoin:round}
.fig .dim line{stroke:var(--steel);stroke-width:1}
.fig .dim text{fill:var(--steel);font-weight:600}
.fig .bar{stroke:var(--steel);stroke-width:1.2}
.fig .load{stroke:var(--ink);stroke-width:1.3;fill:none}
.fig .head{fill:var(--ink)}
.fig .moment{fill:var(--mark);fill-opacity:.45;stroke:var(--ink);stroke-width:1.3}
.fig .joint{stroke:var(--rule);stroke-width:1;fill:none}
.fig .hole{fill:var(--surface);stroke:var(--ink);stroke-width:1.5}
.fig .note{font-style:italic}

.res{background:var(--panel);color:var(--panel-ink);border-radius:10px;padding:20px}
.hero-res .lbl{display:block;font-size:.875rem;color:var(--panel-muted)}
.big{display:block;font-size:clamp(2.2rem,6vw,3rem);font-weight:800;font-stretch:118%;color:var(--mark);line-height:1.1;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.big small{font-size:1rem;font-weight:600;margin-left:6px;color:var(--panel-ink);font-stretch:100%}
.res dl{margin:16px 0 0;padding-top:16px;border-top:1px solid var(--panel-rule);display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px 20px}
.res dt{font-size:.8rem;color:var(--panel-muted)}
.res dd{margin:2px 0 0;font-weight:700;font-size:1.1rem;font-variant-numeric:tabular-nums}
.res dd span{font-weight:500;font-size:.85rem;color:var(--panel-muted)}
.check{margin:16px 0 0;padding:10px 12px;border-radius:7px;font-weight:600;font-size:.9rem}
.check.ok{background:rgba(120,200,110,.16);color:var(--ok)}
.check.bad{background:rgba(255,110,90,.16);color:var(--bad)}
.err{margin:0}

details.method{border-top:1px solid var(--rule);padding-top:12px}
details.method summary{cursor:pointer;font-weight:600}
details.method p{color:var(--muted);max-width:68ch;margin:10px 0 0}

footer{border-top:1px solid var(--rule);padding:24px 0 40px;color:var(--muted);font-size:.875rem}
footer p{margin:0 0 6px;max-width:70ch}

.nav a{text-decoration:none}
.brand{color:inherit;text-decoration:none}
.calc-wrap{padding:8px 0 40px}
.calc-wrap .grid{margin-top:0}
.article{max-width:68ch;padding:8px 0 56px}
.article h2{font-size:1.35rem;font-weight:800;font-stretch:112%;letter-spacing:-.01em;margin:40px 0 8px}
.article h3{font-size:1.05rem;margin:24px 0 4px}
.article p,.article li{line-height:1.65}
.article ol{padding-left:1.3em}
.article table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;margin:12px 0}
.article th,.article td{text-align:left;padding:8px 12px 8px 0;border-bottom:1px solid var(--rule)}
.article th{font-size:.875rem;color:var(--muted);font-weight:600}
.tscroll{overflow-x:auto}
.dir{list-style:none;margin:8px 0 56px;padding:0;border-bottom:1px solid var(--rule)}
.dir a{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:6px 32px;padding:22px 0;border-top:1px solid var(--rule);color:inherit;text-decoration:none}
.dir a:hover .dn,.dir a:focus-visible .dn{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
.dir a:focus-visible{outline:2px solid var(--steel);outline-offset:4px}
.dn{font-size:1.4rem;font-weight:800;font-stretch:118%;letter-spacing:-.01em}
.dd{color:var(--muted)}
@media (max-width:640px){.dir a{grid-template-columns:minmax(0,1fr)}}
footer a{color:inherit}
.grp{font-size:1rem;font-weight:700;color:var(--muted);margin:24px 0 0}
.dir{margin-bottom:24px}

.fh{margin:20px 0 10px;font-size:.8rem;font-weight:700;letter-spacing:.02em;color:var(--muted)}
.inputs .fh:first-child{margin-top:0}

.inputs{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:12px;align-items:end}
.inputs>*{grid-column:1/-1}
.inputs>.field.half{grid-column:auto}

.appbtn{display:inline-flex;align-items:center;min-height:34px;padding:0 14px;border-radius:7px;background:var(--ink);color:var(--bg);font-weight:700;font-size:.875rem;text-decoration:none}
.appbtn:focus-visible{outline:2px solid var(--steel);outline-offset:2px}

.adslot{margin:24px 0;min-height:0;text-align:center}
.adslot:empty{display:none}
.adslot::before{content:"Advertisement";display:block;margin-bottom:4px;font-size:.7rem;color:var(--muted);letter-spacing:.04em}
html[lang=ro] .adslot::before{content:"Publicitate"}

.sharerow{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin-top:16px}
.sharerow .appbtn{border:0;cursor:pointer;font:inherit;font-weight:700;font-size:.9rem}
.sharelink{color:var(--steel);font-weight:600}
.sharenote{color:var(--muted);font-size:.9rem}

.controls{display:flex;flex-wrap:wrap;gap:8px}
.seg a{display:block;padding:6px 12px;font-size:.875rem;font-weight:600;text-decoration:none;color:inherit}
.seg a[aria-current="true"]{background:var(--ink);color:var(--bg)}
.seg a:focus-visible{outline:2px solid var(--steel);outline-offset:-2px}